Kernel Panic caused by MMFS modules

Issue

• The kernel panics with the following backtrace:

 crash> bt
PID: 1608419  TASK: ffff94c9c95d5c40  CPU: 50   COMMAND: "mmfsd"
 #0 [ffff9fc0e262f918] machine_kexec at ffffffff8586095e
 #1 [ffff9fc0e262f970] __crash_kexec at ffffffff8598f7fd
 #2 [ffff9fc0e262fa38] crash_kexec at ffffffff859906ed
 #3 [ffff9fc0e262fa50] oops_end at ffffffff8582437d
 #4 [ffff9fc0e262fa70] no_context at ffffffff858715ff
 #5 [ffff9fc0e262fac8] __bad_area_nosemaphore at ffffffff8587195c
 #6 [ffff9fc0e262fb10] do_page_fault at ffffffff85872237
 #7 [ffff9fc0e262fb40] page_fault at ffffffff862010fe
    [exception RIP: _raw_spin_lock+12]
    RIP: ffffffff8615015c  RSP: ffff9fc0e262fbf0  RFLAGS: 00010246
    RAX: 0000000000000000  RBX: 0000000000000020  RCX: 0000000000000001
    RDX: 0000000000000001  RSI: ffff94b2814ab288  RDI: 00000000000000a8
    RBP: 00000000000000a8   R8: 0000000000000000   R9: ffffffffc061a3c0
    R10: ffff94b2cb9d52c8  R11: 0000000000000001  R12: ffffffffc177f818
    R13: ffff94b2814ab288  R14: 0000000000000000  R15: 0000000000000001
    ORIG_RAX: ffffffffffffffff  CS: 0010  SS: 0018
 #8 [ffff9fc0e262fbf0] igrab at ffffffff85b36ca9
 #9 [ffff9fc0e262fc08] cxiRefOSNodeInternal at ffffffffc0ea3418 [mmfslinux]
#10 [ffff9fc0e262fc48] _ZN10gpfsNode_t17findButDontCreateEP11StripeGroup7FileUIDPPvPPS_ at ffffffffc154af8b [mmfs26]
#11 [ffff9fc0e262fca8] _ZN10gpfsNode_t21invalidateOSNodeByUIDEP11StripeGroup7FileUIDi at ffffffffc154bef8 [mmfs26]
#12 [ffff9fc0e262fd08] kxInvalidateOSNode at ffffffffc156227d [mmfs26]
#13 [ffff9fc0e262fd78] _Z8ss_ioctljm at ffffffffc16c3235 [mmfs26]
#14 [ffff9fc0e262fdf8] ss_fs_unlocked_ioctl at ffffffffc0eb4087 [mmfslinux]
#15 [ffff9fc0e262fe80] do_vfs_ioctl at ffffffff85b2dc34
#16 [ffff9fc0e262fef8] ksys_ioctl at ffffffff85b2e270
#17 [ffff9fc0e262ff30] __x64_sys_ioctl at ffffffff85b2e2b6
#18 [ffff9fc0e262ff38] do_syscall_64 at ffffffff8580420b
#19 [ffff9fc0e262ff50] entry_SYSCALL_64_after_hwframe at ffffffff862000ad
    RIP: 00007fe64d11662b  RSP: 00007fe2af3641d8  RFLAGS: 00000246
    RAX: ffffffffffffffda  RBX: 00000180a3bbd7e0  RCX: 00007fe64d11662b
    RDX: 00007fe2af3641e0  RSI: 0000000000000045  RDI: 0000000000000004
    RBP: 00000180c44ca420   R8: 0000000000000020   R9: 0000000000000030
    R10: 0000000000000002  R11: 0000000000000246  R12: 00005556c5320240
    R13: 0000000000000001  R14: 00000180a3bbd7f8  R15: 0000000000000002
    ORIG_RAX: 0000000000000010  CS: 0033  SS: 002b